Cryogenic shock exfoliation for ultrahigh mobility rhombohedral graphite nanoelectronics
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| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| author | Holleis, Ludwig Choi, Youngjoon Zhang, Canxun Farrell, Jack H. Bargas, Gabriel Hsu, Audrey Chen, Zexing Sackin, Ian Zhou, Wenjie Guo, Yi Charpentier, Thibault Jiang, Yifan Foutty, Benjamin A. Keough, Aidan Huber, Martin E. Taniguchi, Takashi Watanabe, Kenji Lucas, Andrew Young, Andrea F. |
| author_facet | Holleis, Ludwig Choi, Youngjoon Zhang, Canxun Farrell, Jack H. Bargas, Gabriel Hsu, Audrey Chen, Zexing Sackin, Ian Zhou, Wenjie Guo, Yi Charpentier, Thibault Jiang, Yifan Foutty, Benjamin A. Keough, Aidan Huber, Martin E. Taniguchi, Takashi Watanabe, Kenji Lucas, Andrew Young, Andrea F. |
| contents | Rhombohedral multilayer graphene (RMG) offers a highly tunable platform for correlated electron physics, featuring field-effect control of magnetic, superconducting, and topological phases[1-24]. The promise of these materials has been held back by the limited abundance of rhombohedral stacking in natural graphite, which constrains both sample yield and useful area. Here we introduce 'cryogenic shock exfoliation' to produce large area rhombohedral graphene flakes which, combined with a low-pressure van der Waals assembly technique that preserves stacking order, enable highly uniform devices exceeding 1300 $μm^2$ with fabrication yields of 90%. Using scanning nanoSQUID-on-tip imaging, we demonstrate uniform spin magnetism over the full central 10 times 10 $μm^2$ area of our devices. Transverse magnetic focusing reveals a disorder mean free path exceeding 200 $μm$ at low temperatures. Within the flat surface bands of RMG[20], we observe a size-driven crossover from Poiseuille to porous electron flow in the intermediate-temperature regime of strong electron-electron hydrodynamics[16, 25], providing a further signature of ultrahigh device quality. Our approach overcomes a key materials bottleneck in the fabrication of mesoscopic rhombohedral graphene devices, paving the way for incorporating strongly correlated phases into two-dimensional nanoelectronics. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_21912 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Cryogenic shock exfoliation for ultrahigh mobility rhombohedral graphite nanoelectronics Holleis, Ludwig Choi, Youngjoon Zhang, Canxun Farrell, Jack H. Bargas, Gabriel Hsu, Audrey Chen, Zexing Sackin, Ian Zhou, Wenjie Guo, Yi Charpentier, Thibault Jiang, Yifan Foutty, Benjamin A. Keough, Aidan Huber, Martin E. Taniguchi, Takashi Watanabe, Kenji Lucas, Andrew Young, Andrea F. Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons Rhombohedral multilayer graphene (RMG) offers a highly tunable platform for correlated electron physics, featuring field-effect control of magnetic, superconducting, and topological phases[1-24]. The promise of these materials has been held back by the limited abundance of rhombohedral stacking in natural graphite, which constrains both sample yield and useful area. Here we introduce 'cryogenic shock exfoliation' to produce large area rhombohedral graphene flakes which, combined with a low-pressure van der Waals assembly technique that preserves stacking order, enable highly uniform devices exceeding 1300 $μm^2$ with fabrication yields of 90%. Using scanning nanoSQUID-on-tip imaging, we demonstrate uniform spin magnetism over the full central 10 times 10 $μm^2$ area of our devices. Transverse magnetic focusing reveals a disorder mean free path exceeding 200 $μm$ at low temperatures. Within the flat surface bands of RMG[20], we observe a size-driven crossover from Poiseuille to porous electron flow in the intermediate-temperature regime of strong electron-electron hydrodynamics[16, 25], providing a further signature of ultrahigh device quality. Our approach overcomes a key materials bottleneck in the fabrication of mesoscopic rhombohedral graphene devices, paving the way for incorporating strongly correlated phases into two-dimensional nanoelectronics. |
| title | Cryogenic shock exfoliation for ultrahigh mobility rhombohedral graphite nanoelectronics |
| topic | Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2604.21912 |